Bobbin-case retainer



J. c. DOBYNE 1,841,404

BOBBIN CASE RETAINER f Jan. 19, 1932.

Filed March 29, 1930 I I i 5- z 10 1 1 I I a m l I I I Referring tothe'drawings, 1 designates the tainer: in' order to allow? the retainerto be A I stop to limit the movement of the retainer 3 in justment ofthese vscrews. When it s de- Patented Jan. 1%}, 1932 1,: i i I I entree,srsa'res P ATENT. .orrica: v

JOHN G. DOIBYNE, on sTsLooIs, MissoUnI- noenin-onsn-nnralnnn itApplication filed mach 2e; 15336. ssuer's (1;!teaser. I V

This invention pertains to shoe sewing mausted p ositionilPivotedatilgin a V chines and more particularly tobobbin-case 13 of theframeofthesewing machineadjaretainers for such machines. ccntthe head1,-and so as to movetransversely One of the ob ects of this invention isto oflthemovement of the retamer 3, is alatch,

provide improved means for releasing the member-14;provided'with ahandle15.- Thev 55 bobbin-case for removal in order to replace latch 14 in oneof its positions' on thezpivot 12 an emptybobbin by a full one. I ispositioned'to be, engaged by thetipof the Another object is to providemeans whereby. screw- 10 which thus provides a stopto pre the timeconsumed in changing bobbins may ventthe outward movement of theretaineri 19 be reduced to a minimum. v Band-retain the latter in positionbefore the, 0f

ul-inot-her object is to provide a bobbin-case bobbin-case. v In thisposition the latch 1d retainer-which may be accurately adjusted torests-against avertical face .ofthe frame "13 q p its operating positionand which may be reso that itrisysupported against the lpressureleasedto free the bobbincase and returnedrjofthe guard 'j E to operatingposition without deranging such The latch letthus provides anabutmentfor' adjustment. a the screw ,10; which may be'nioved out of .en-Further objects will'appear from the folgagementfwitlrsaidscrew'inordertoperm it lowing description taken in connection with movementofthe retainergso as tofree'the V the accompanying drawings, in which: i,bobbincase. ='The latch l i falsoperformszthe j Figure 1 is a plan viewshowing the shuttle function pfrpositioningtheretainer relative head ofa shoe sewing machine and adjacent to thief-frame which wheninretainingsposi-v I parts, equipped with a bobbin-case retainertionholds' the," retainer in its closed position embodying thisinvention before the bobbin-case andwhichflmay bere- Figure 2 is afrontview of Figure 1. p 1 flmoved ffrom between gt-heframe and the reyf r shuttle head of a sewing machine'in which is'inoved"tolopenpositioni i j j mounted for appropriate movement ashuttle The extension 19bit; the retainer. may be I carrying a.bobbin-case 2 in the usual manequipped with arearw'ardly extendingpin 16ner; A retainer or guide arm 3 provided to whose-outer'endis connected2; spring 17 with a stop-bearing at is adapted-to engage. which-fis-alsoconnected tqthei frame 13m 9 a cooperating stop 5 on the bobbin-caseQsosuch a manner asto urge the retainerB-Qutas to retain the latter inplace and to allow zwardlytoits-,jopen position'as indicated by for itsmovement while permitting passage the dotteddinesin Figure 1.

M of the thread between the two; j a r g In theuse-of this-device,the-screws 17 and 1 i The retainer 3 is pivoted on a verticalpin .lO arefadjustedsol as'to; accurately fixathe; T 6 mounted in the head 1. Thispivotal position of the retainer'B initsclosedgposh mounting permits theretainer to swing outtion'f-i Itwillbe' noted' thatthese adjustingwardly to the position shown in dotted lines 1 screws:act in oppositiontoflone another;that.

m in Figure 1, so as to free the bobbin-case which is, oneiaof thfem'limits the-frnovement of-the" may then be removed and refilled. Thereretailieliinhone direction .whilefthe other". tainer 3' has mountedtherein an adjusting limitsits movement inthe opposite direction.

' screw 7 whose tip engages the head 1 as illus- 'Accordingly,th'elretainer may be accurately trated in Figure 1. This screw servesasa positioned-in itsolosed position by proper adone direction and toadjust its spacing from sired toachangel bobbinsithe operator simply themember A lock nut 8 may beprovidedi' lifts: the handle, Thisraisesftlieslatch'l v "to secure the screw Tin adjustedposition. onitspivotl2toftheposition'shown dotted The retainer is provided with anextension lines i'n Figf 2. g 'llhis movement carries'the 9 in which ismountedan adjusting screw 10 latohclearflojf the stop s'crewflOhndreleases i provided with a lockinutll for securing it the retainer fi.er bei'ng tensio'ned' by the spring 17 thereupon moves to its openposition as indicated in Figure 2, thereby freeing the bobbin-case 2which may then be refilled. As soon as the new bobbin is in- 'ser-ted,the operator replaces the bobbin-case and pushes the retainer 3 back toits closed 1 position and presses the latch 14 into the solid lineposition of Figure 2, behind the screw 10 so as to hold the retainer inits closed posi- 'tion. 7 I

'It will be seen that this'inve'n'tion provides a' simple and ruggedconstruction for the retainer and'one'which is not only simple to'operate but" easy to adjustand. which cwillj v u T maintain its.adjustment. The arrangement 'of'the adjusting elements; so as to act inoppositionto-one another to limit the movement I of tlie'retain'er'inopposite directions makes it 7 thread to'pass freely therebetweenduringthe possible to adjust the position of the retainer r veryaccurately. This is important in' a machine of this" type in order thatthe bobbincase may be securely retained'andpositioned' so as to allowfree and accurate movement of the parts involved and at the-same time#to allow thenecessa-ry clearance between the;

bobbin-case and the retainerto permit the operation. of forming thestitch The en said latch so that it is -notliabl'etojump out gagement ofthe screw 10 with the latch 14 is under suflicient pressure tofrictionally retain diiri-ngthe operation of themachina. At the sametime thelatch is easily and quickly re-" leasedwhen it'isdesired toreplace the bob? bin; The, spring 17 holds ,the'retalnerout, of

it bobbins;

7 It is: obviousithat various changes may be 1 V, made in details,within the scopeof the ap-.

the" way during the operation, of changing 1 f pendedclaimswithoutdepart ing from the. 7 spirit of this invention. "It is,therefore,to be understood that this inventiongis notjto belimitedltbi'the p ifi details shown and/ r 'des'c'ribedi I v Having thusdescribedthe invention what is claimed is: p v

1. Ina device ofthe kind described; a sup- 1 7 port, a, bobbin caseremovably mounted thereon, a retainer movably mounted on saidpositioning 11183118011 the retainer cooperatsupport having-a'bobbincase engaging part,

' 7 ing with thesupport, said retainer having an arm extendingsubstantially 'parallel'to the bobbin. case engaging" part, anda'latchdise *osed' to engage the arm to position the bob-V ifbinl caseengaging part. T- v 1- '1 2. Ina device of thekinddescribedjasup-r 7 portQ a' bobbin case removably mounted there- V on, a retainer movablymounted on said sup-2 port having a bobbin case engaging jpart i l"'posit'ionin'gnieanson;the retainer cooperat i ing with the support,said retainer having an r arm extending subjstantially parallel to thebobbin case engag ing part,aI1atch-'disposed 1 t0 engage-the armtoposition'the bobbin case

